Desnorkel Me Please

[eicheldp]

Originally Posted by JFP in PA

If it is a "good thing", why doesn't do something more positive? Increasing surface area or changing the volume upwards on intake systems does not always yield anything positive, and quite often makes things worse.

To properly gauge the impact of intake modifications, they need to be first tested on a flow bench to determine the amount of and direction of the change, and then confirmed in terms of engine volumetric efficiency on a fully instrumented dyno. And quite often, making things flow better in the intake then mandates modifications to the cylinder heads and cams to actually take advantage of the flow improvement's.

These engines are a system; making a change over here often yields nothing without a lot of other changes as well. That is what engine development is all about, and anyone that has done it will tell you bigger is not always better.........

JFP,
Thank you for the information. I have been reading numerous posts on removing the snorkel but until this thread, everything has been conjecture. Your logic has made my decision easy. I have an 04 S that is stock. I'm keeping the snorkel.

[Jamesp]

No question Porsche went to great lengths to maximize performance while minimizing cost (reality). There are no parts on any Boxster that were not deemed vital for the function they performed, or they would be eliminated for cost. Induction / increasing volumetric efficiency in the intake is a big deal. The flared inlet and ~5 degree increase in diameter in the part pictured below screams "minimize turbulence and transition to laminar airflow" to me, which of course, increases inlet mass airflow. The car may not not sound as cool to bystanders, but a modest increase in performance might be anticipated.

[Jager]

http://986forum.com/forums/performance-technical-chat/9671-finally-dyno-charts-de-snorked-986s-6.html

[JAAY]

I'm running a 987 airbox and even have the stock 987 snorkel on it. It's there for a reason and I know of a person who has dynoed with and without and their curves were smoother with.